Mobile Device Accessory

ABSTRACT

The subject matter of this specification can be embodied in, among other things, a mobile device accessory includes a housing defining an attachment surface that is configured to engage a mobile device, a wearable component configured to be worn by a user of the mobile device, a separation detector configured to detect separation of the wearable component relative to the housing, and provide a signal when the wearable component becomes separated from the housing, and an alarm device configured to activate in response to the signal. Alternatively, the mobile device accessory may be a standalone device not designed to be attached to a mobile device.

TECHNICAL FIELD

The present disclosure relates to a mobile device accessory, forexample, one that includes an alarm device for personal protectionpurposes.

BACKGROUND

Personal safety remains a challenge for essentially all people. Over thecourse of one's life, there may be situations in which he or she feelsthat his or her personal safety is at risk. Because many people nowroutinely carry a mobile device (e.g., a mobile phone), a person whobelieves that his or her personal safety is at risk can use the deviceto manually contact (e.g., by text message or phone call) someone else,for example, the police or other entity, to alert them to the person'scurrent situation. In this way, help can be summoned to assist theperson whose safety is at risk.

SUMMARY

In general, this document describes a mobile device accessory thatincludes, e.g., an alarm device for personal protection purposes.

In a first aspect, a mobile device accessory includes a housing definingan attachment surface that is configured to engage a mobile device, awearable component configured to be worn by a user of the mobile device,a separation detector configured to detect separation of the wearablecomponent relative to the housing, and provide a signal when thewearable component becomes separated from the housing, and an alarmdevice configured to activate in response to the signal.

Various embodiments can include some, all, or none of the followingfeatures. The attachment surface can be configured to engage a rearsurface of the mobile device. The wearable device can be configured toseparate from the housing when the wearable component exceeds apredetermined separation distance from the housing. The wearablecomponent can include a lanyard having a predetermined length configuredto mechanically attach to the housing, and configured to mechanicallyseparate from the housing when a distance between the wearable componentand the housing exceeds the predetermined length. The separationdetector can include a connectivity sensor configured to determinewhether the housing and the lanyard are mechanically separated. Thewearable component can further include a wireless transmitter configuredto transmit a wireless tether signal, and the separation detectorfurther comprises a wireless receiver configured to receive the wirelesstether signal at a received signal strength that is representative of adistance between the wearable component and the housing, and detectseparation of the wearable component from the housing based on acomparison of the received signal strength to a predetermined signalstrength defining a predetermined separation distance. The mobile devicecan be a mobile telephone. The alarm device can also include an audiooutput component disposed within the housing and configured to emit anaudible alert when activated. The alarm device can be silent whenactivated. The alarm device can be configured to provide an alarm signalto the mobile device when the alarm device is activated. The mobiledevice accessory can include instructions stored in a memory device ofthe mobile device, that when executed by a data processing apparatus ofthe mobile device to perform operations including receiving, from thealarm device, the alarm signal,

and sending, in response to the received alarm signal, a communicationto one or more recipients. The operations can also include determining,by the mobile device, a location of the mobile device, wherein thecommunication includes location data that is descriptive of thedetermined location. The housing can include an input mechanism, whereinthe alarm device is further configured to be activated in response toactuation of the input mechanism. Actuation of the input mechanism caninclude movement of the input mechanism along a predefined non-linearpath. The housing can envelop at least a portion of the mobile device.The housing can define a cavity sized to accommodate storage of thewearable component.

In a second aspect, a method includes engaging an attachment surface ofa housing of a mobile device accessory to a mobile device, donning, upona user of the mobile device, a wearable component, detecting, by aseparation detector, that the wearable component has separated from thehousing, and activating, based on detecting, an alarm device.

Various implementations can include some, all, or none of the followingfeatures. Detecting that the wearable component has separated from thehousing can include detecting a mechanical separation of the housing anda lanyard affixed to the wearable component, the lanyard having apredetermined length and mechanically connecting the wearable componentto the housing, the lanyard being mechanically separable from thehousing when distance between the wearable component and the housingexceeds the predetermined length. Detecting that the wearable componenthas separated from the housing can include determining a signal strengthof a wireless tether signal transmitted by a wireless transmitter of thewearable component to a wireless receiver arranged within the housingand in communication with the separation detector, the signal strengthbeing representative of a distance between the wearable component andthe housing, and determining that the signal strength is less than orequal to a predetermined signal strength defining a predeterminedseparation distance. Activating the alarm device can includetransmitting an alarm signal, and the method can also include receiving,by mobile device, the alarm signal, and sending, by the mobile deviceand in response to the receiving the alarm signal, a predeterminedcommunication to one or more predefined recipients. Activating the alarmdevice can include activating an audio output component disposed withinthe housing and configured to emit an audible alert when activated. Themethod can also include removing the wearable component from a cavitydefined by the housing, wherein the cavity is sized to accommodatestorage of the wearable component. The method can also include doffingthe wearable component from the user, and stowing the wearable componentin a cavity defined by the housing, wherein the cavity is sized toaccommodate storage of the wearable component.

In a third aspect, a mobile device accessory includes (a) a housingdefining an attachment surface that is configured to engage a mobiledevice, the engagement including both a physical attachment to themobile device and a communications connection to the mobile device forcontrolling operation of the mobile device, (b) a wearable componentconfigured to be worn by a user of the mobile device, and (c) controlcircuitry to control operation of the mobile device accessory, thecontrol circuitry configured to perform operations including (i) detectthat the wearable component has become separated from the mobile deviceaccessory, and (ii) in response to the detection, cause the mobiledevice to perform one or more predetermined operations.

Various embodiments can include some, all, or none of the followingfeatures. The communications connection to the mobile device can be awireless connection. The wireless connection can be a BLUETOOTHconnection or any other similar or suitable wireless communicationprotocol. Controlling operation of the mobile device can includecommunicating with a software application executing on the mobiledevice. The control circuitry can include a processor and a memorycontaining machine instructions to be executed by the processor. Thewearable component can include a lanyard component physically connectedto the mobile device accessory. Detecting that the wearable componenthas become separated can include detecting a physical detachment betweenthe wearable component and the mobile device accessory. The wearablecomponent can include a detached component communicatively coupled tothe mobile device accessory. Detecting that the wearable component hasbecome separated can include either or both of detecting that aproximity between the wearable component and the mobile device accessoryexceeds a predetermined distance, or that the wearable component (e.g.,a strap or lanyard) has become physically separated from the accessory.Causing the mobile device to perform one or more predeterminedoperations can include causing an app executing on the mobile device toperform one or more of: initiating a communication with anothercommunication device, activating a camera on mobile device, activating amicrophone on the mobile device, emitting an audible sound, and turningon location detector. Initiating a communication with anothercommunication device can include sending one or more predeterminedmessages to one or more predetermined recipients. The predeterminedmessage can include one or more of a distress message, positioningcoordinates, audio captured by mobile device, and video captured by themobile device. Initiating a communication with another communicationdevice can include initiating one or more of: a telephone call, anemail, and a text message. The mobile device accessory can also includean audible alarm. The control circuitry can be configured to sound theaudible alarm upon detecting that the wearable component has becomeseparated from the mobile device accessory. The audible alarm caninclude predetermined spoken words. The audible alarm can include noiseloud enough to attract attention from others in the vicinity of themobile device.

In another configuration, the mobile device accessory is not designed tobe attached to the mobile device but rather is implemented as astandalone device that can be carried and/or worn by a user (e.g.,attached to the user's wallet or carried in the user's pocket, handbag,brief case, or backpack) of the mobile device. In this configuration,the mobile device accessory has (a) a communication mechanism configuredto maintain a wireless communications connection between the mobiledevice accessory and the mobile device for controlling operation of themobile device; (b) an activation mechanism (e.g., a button or a strapphysically connected to the accessory) configured to be activated by auser; and (c) a control mechanism to control operation of the mobiledevice accessory, the control circuitry configured to perform operationsincluding: (i) detect that the user has activated the activationmechanism; and (ii) in response to the detection, cause the mobiledevice to perform one or more predetermined operations. The mobiledevice accessory may further include an alarm mechanism configured tocause a human-perceptible alarm (e.g., loud sound and/or flashing light)in response to a detection that the user has activated the alarmmechanism. The activation mechanism may be a button that is pressable bythe user or a wearable component (e.g., strap or lanyard) that isdesigned to be worn by the user or both. The activation mechanism iscaused to be activated upon either of a press of a button on theaccessory or a physical separation of the wearable component from themobile device accessory.

The systems and techniques described here may provide one or more of thefollowing potential advantages. For example, the mobile device accessoryas described herein may provide protection for a user of the accessorywho comes under attack or assault by another entity (e.g., another humanor an animal) by performing one or more of the following actions uponactivation of the accessory: causing the mobile device to perform anoperation such as sending a message or call for help, turning on themobile device's camera, microphone, speaker, light or the like, and/oremitting a human perceptible alarm designed to draw attention to theuser and/or scare off the attacker.

Details of one or more implementations are set forth in the accompanyingdrawings and the description below. Other features and potentialadvantages will be apparent from the description and drawings, and fromthe claims.

DESCRIPTION OF DRAWINGS

FIG. 1 illustrates a perspective view of a mobile device accessorycoupled to a mobile device.

FIG. 2 illustrates a side view of the mobile device accessory and mobiledevice of FIG. 1.

FIG. 3 illustrates an alternate perspective view of the mobile deviceaccessory and mobile device of FIG. 1.

FIG. 4 illustrates an alternate perspective view of the mobile deviceaccessory and mobile device of FIG. 1 wherein a power source of themobile device accessory is removed.

FIG. 5 illustrates an alternate perspective view of the mobile deviceaccessory and mobile device of FIG. 1 wherein a wrist strap of themobile device accessory is in use.

FIG. 6 illustrates an alternate perspective view of the mobile deviceaccessory and mobile device of FIG. 1 wherein a user separation sensorarrangement activates an alarm device.

FIG. 7 schematically illustrates components of the mobile device and themobile device accessory of FIG. 1.

FIG. 8 illustrates an enlarged view of the switch of the mobile deviceaccessory of FIG. 1.

FIG. 9 schematically illustrates components of the alarm device of FIG.7.

FIG. 10 illustrates an embodiment of the mobile device accessoryincluding the switch of FIG. 8.

FIG. 11 illustrates a mobile device accessory provided in the form of acase according.

FIG. 12 illustrates a mobile device accessory wherein the mobile deviceaccessory is substantially rectangular with rounded comers.

FIG. 13 illustrates a mobile device accessory wherein the mobile deviceaccessory is round.

FIG. 14 illustrates a mobile device accessory wherein the userseparation sensor arrangement includes a wireless wearable component.

FIGS. 15-18 illustrate a mobile device accessory wherein the mobiledevice accessory is ovular.

FIG. 19 illustrates a mobile device accessory wherein a wearablecomponent of the user separation sensor arrangement is not attached forillustration purposes.

FIG. 20 illustrates a mobile device accessory wherein a mobile device isnot attached for illustration purposes.

FIG. 21 illustrates a mobile device accessory wherein the mobile deviceaccessory is attached to a case for the mobile device.

FIGS. 22A-F illustrate steps associated with usage of a wrist strap ofthe mobile device accessory of FIG. 21.

FIG. 23 illustrates a personal safety device that does not require usageof a separate mobile device.

FIG. 24 illustrates a rear view of a mobile device accessory coupled toa mobile device and including a nail slot.

FIG. 25 illustrates a perspective view of a mobile device accessory andmobile device of FIG. 24.

FIG. 26 illustrates an alternate perspective view of the mobile deviceaccessory and mobile device of FIG. 24.

FIG. 27 illustrates a rear view of a mobile device accessory coupled toa mobile device and including an enlarged nail slot.

FIG. 28 illustrates a perspective view of the mobile device accessoryand mobile device of FIG. 27.

FIG. 29 illustrates a perspective side view of another example mobiledevice accessory.

FIG. 30 illustrates a front view of the example mobile device accessoryof FIG. 29.

FIG. 31 illustrates a top perspective view of the example mobile deviceaccessory of FIG. 29.

FIG. 32 illustrates an alternate top perspective view of the examplemobile device accessory of FIG. 29.

FIG. 33 illustrates a bottom perspective view of the example mobiledevice accessory of FIG. 29.

FIG. 34 illustrates an alternate bottom perspective view of the examplemobile device accessory of FIG. 29.

FIG. 35 illustrates perspective rear view of the example mobile deviceaccessory of FIG. 29.

FIG. 36 is a flow chart of an example process for using an examplemobile device accessory.

DETAILED DESCRIPTION

This document describes systems and techniques for providing personalprotection in the form of an alarm accessory for a mobile device. Ingeneral, a mobile device, e.g., a cellular telephone (phone) or a mobilephone, can be modified (e.g., attached to an accessory and/or throughthe use of specialized software on the mobile device), to respond to oneor more predetermined conditions to automatically, and/or with userinteraction, trigger an alarm and thereby draw attention to thatperson's present circumstances in order to seek help and/or scare away apotential threat. Accordingly, this document describes, among otherthings, an accessory that can be attached to the mobile device andprovide enhanced safety functionality to a user of the mobile device.Various configurations of such a mobile device accessory and its use aredescribed herein, and may include various combinations of the followingfeatures and/or functionality. The accessory may be embodied in manydifferent forms and should not be construed as limited to theimplementations set forth herein. As used in the specification, and inthe appended claims, the singular forms “a”, “an”, “the”, include pluralvariations unless the context clearly dictates otherwise.

As illustrated in FIGS. 1-6, the present disclosure relates to a mobilephone accessory 100, also referred to a mobile device accessory. Themobile phone accessory 100 may be configured for use with a mobiledevice such as mobile phone 200 or other mobile device (e.g., tabletcomputer, notebook computer, etc.). In particular, the mobile phoneaccessory 100 may be configured to engage (e.g., adhere to or otherwisebe physically joined to) the mobile phone 200. The mobile phoneaccessory 100 may be configured to engage any portion of the mobilephone 200, such as the rear surface of the housing of the mobile phone200.

In one implementation, the mobile phone accessory 100 may include ahousing 102. The housing 102 may define an attachment (e.g., locking)surface 104 (see, FIG. 2) and an outer surface 106 (see, e.g., FIG. 1).As illustrated in FIG. 2, the attachment surface 104 may be configuredto engage a rear surface 202 of the mobile phone 200 opposite from afront surface 204 at which a display is positioned. Thereby, the mobilephone accessory 100 does not block the display in this configuration.Further, the mobile phone accessory 100 may occupy less than an entiretyof an area of the rear surface 202 of the mobile phone 200. Thereby, themobile phone accessory 100 may not block any rear-facing camera thereon.Further, by providing the mobile phone accessory 100 with a relativelysmall size, the mobile phone accessory may be attached to mobile phoneswith differing sizes and shapes. Further, the mobile phone accessory 100may be configured to not extend to the edges of the mobile phone 200,such that an edge protecting case may be employed with the mobile phone.As may be understood, the mobile phone accessory may also be configuredto engage a case for the mobile phone that includes a rear portion thatcovers the rear surface (see, e.g., FIGS. 21 and 22). In anotherembodiment, the mobile phone accessory may itself comprise a case forthe mobile phone (see, e.g., FIG. 11).

The attachment surface 104 of the housing 102 may be configured tosubstantially permanently engage the rear surface 202 of the mobilephone 200, or a case positioned at the rear surface as noted above. Forexample, the mobile phone accessory 100 may include an adhesive at theattachment surface 104 configured to adhere to the rear surface 202 ofthe mobile phone 200. Thereby, the mobile phone accessory 100 may beconfigured for use over the lifetime of the mobile phone 200, therebyensuring that the mobile phone accessory is available at all times themobile phone is in the user's possession. Alternatively, the attachmentsurface 104 of the housing 102 may be configured to releasably engage(e.g., using a slot-tab arrangement, or hook and loop connectingsurfaces such as VELCRO®) the rear surface 202 of the mobile phone 200,or a case positioned at the rear surface as noted above.

As illustrated in FIG. 4, the mobile phone accessory 100 may include apower source 108, which may be a battery. Further, the housing 102 mayinclude a battery portion 110 that is configured to receive the powersource 108. The battery portion 110 may be removable to allow forreplacement of the power source 108. The power source 108 may beconfigured to provide electrical power to each of the components of themobile phone accessory 100 such that the mobile phone accessory isself-powered. However, as may be understood, in another implementationthe mobile phone accessory may be configured to receive electrical powerfrom the mobile phone. For example, the mobile phone accessory mayinclude a connector that engages a power port or a headphone jack on themobile phone. Alternatively, or in addition, the mobile phone accessorymay draw power from the phone wirelessly via a technique akin to QI®inductive charging, but in reverse.

Additional control circuitry components of the mobile phone accessory100 and the mobile phone 200 are schematically illustrated in FIG. 7. Asillustrated, the mobile phone accessory 100 includes an alarm device112, which may be at least partially received in the housing 102. Thealarm device 112 is in communication with the mobile phone 200 (e.g.,BLUETOOTH, USB) for providing signals to the mobile phone 200, forexample, to request, trigger, command, or otherwise control at leastsome operation or actions of the mobile phone 200. The alarm device 112may include an audio output device 114 such as a speaker and a lightoutput device 116 such as a light emitting diode (LED) or xenon strobe.Example positions and configurations of the audio output device 114 andthe light output device 116 are illustrated in FIGS. 1 and 3-6.

As further illustrated in FIG. 7, the control circuitry of the mobilephone accessory 100 includes a user separation sensor arrangement 118(e.g., proximity detector). The user separation sensor arrangement 118may include a wearable component 120 configured to engage (e.g., donnedby, worn by) a user and a connectivity sensor 122 engaged with thehousing 102 and in communication with the alarm device 112. The alarmdevice 112 may be configured to activate and/or perform one or morepredetermined operations in response to the connectivity sensor 122'sdetermining that the wearable component 120 exceeds a thresholdseparation distance therefrom, and/or has become detached (e.g.,mechanically separated) from the mobile accessory 100, e.g., providingan alarm signal to indicate that separation between the mobile accessory100 and the wearable component 120 has occurred, in response to whichone or more actions can occur—e.g., sounding an audible alarm on theaccessory, emitting light from a light source on the accessory, causethe attached phone's flash light to turn on or strobe, cause theattached phone to transmit a message via text and/or phone call, causethe mobile phone to emit sound, cause the mobile phone to take photos orbegin recording video, either through the forward-facing camera or therearward-facing camera or the both, or otherwise any operation withinthe attached phone's functionalities. Note that any phone-based actioncould be achieved by the accessory's transmitting to the mobile phonethat an alarm condition has been detected, e.g., in response to theuser's pushing a button on the accessory, or in response to theproximity between the accessory and the wearable component beingexceeded and/or in response to the wearable component being mechanicallydisconnected from the accessory.

With regard to the latter, as illustrated in FIG. 5, in one embodimentthe wearable component 120 may comprise a wrist strap. Initially, theconnectivity sensor 122 and the wearable component 120 of the userseparation sensor arrangement 118 may be physically connected. Forexample, as illustrated in FIG. 5, a lanyard 124 (e.g., mechanicaltether) may connect the wearable component 120 to the housing 102 via aconnector 126.

As noted above, the alarm device 112 may be activated in response toreceipt of a signal generated by the separation sensor arrangement 118when the user separation sensor arrangement 118 determines that thewearable component 120 has become physically detached from theaccessory, and/or exceeds a threshold separation distance from theconnectivity sensor 122. Thereby, the threshold separation distance maybe defined between the housing 102 and the wearable component 120. Thus,for example, the lanyard 124 may have a predetermined length that atleast partially defines the threshold distance, and the lanyard may beconfigured to mechanically and/or electrically attach to the housing 102and separate from the housing 102 when the distance between the wearablecomponent 120 and the housing 102 exceeds the predetermined length ofthe lanyard 124. The separation sensor arrangement 118 can include aconnectivity sensor configured to determine whether the housing 102 andthe lanyard are mechanically and/or electrically separated and providean alarm signal in response.

As illustrated in FIG. 6, when a user's wrist to which the wearablecomponent 120 is attached moves away from the housing 102 of the mobileaccessory device 100 by a distance exceeding the length of the lanyard124, the lanyard may pull out (e.g., separate, break away) the connector126 from the housing 102 and out of engagement with the connectivitysensor 122, thereby activating the alarm device 112 (see, FIG. 7).

Further, in one embodiment the connector 126 may include a whistle.Thereby, once the connector 126 is removed from the housing 102, theuser may blow on the whistle to bring attention to the user'scircumstances, scare away an assailant, and/or summon help.

In an alternate embodiment, the connector extending from the wearablecomponent may be configured to engage a power and/or data port of themobile phone or a headphone jack thereon. In this embodiment, the mobilephone may itself (e.g., via a software application executing on themobile phone) detect detachment or separation of the wearable componentfrom the port or jack, thereby activating the alarm device.

As schematically illustrated in FIG. 7, the mobile phone accessory 100may also include a switch 128. The switch 128 may be provided inaddition to, or as an alternate for, the user separation sensorarrangement 118. In a preferred embodiment, both the user separationsensor arrangement 118 and the switch 128 are provided.

An example embodiment of the switch 128 is illustrated in FIGS. 1 and3-6. In some embodiments it may be desirable to provide the switch 128with features configured to prevent accidental actuation thereof so asto avoid accidental activation of the alarm device 112 (see, FIG. 7). Inthis regard, in some embodiments actuation of the switch 128 may requiremovement of the switch along a non-linear path. For example, FIG. 8illustrates an enlarged example embodiment of an embodiment of theswitch 128A. As illustrated, the switch 128A may include a center button130 and an outer slider 132. In order to activate the switch 128A, auser may slide the slider 132 in order to depress the center button 130.Thereby, issues with respect to accident actuation of the switch 128Amay be mitigated. Various other switches requiring multi-stage actuationmay be provided in other embodiments.

The alarm device 112 may be configured to be activated in response to asignal from the user separation sensor arrangement 118 and/or the switch128. The particular response by the alarm device 112 may be set asdesired. In some embodiments activation of the alarm device 112 by theswitch 128 may result in the same response as activation of the alarmdevice by the user separation sensor arrangement 118. However, in otherembodiments activation of the alarm device 112 by the switch 128 mayresult in a different response as compared to activation of the alarmdevice by the separation sensor 118.

For example, the alarm device 112 may be configured to output an audiblealarm configured to output sounds, predetermined spoken words, and/ornoises (e.g., siren, buzzer, bell, speech) that are loud enough toattract attention from others in the vicinity of the mobile phone 200when the user separation sensor arrangement 118 determines that thethreshold separation distance is exceeded. In this regard, one or bothof the audio output device 114 and the light output device 116 may beactivated. However, in some configurations, the alarm device 112 may besilently activated when the switch 128 is actuated. In this regard, thealarm device 112 may be configured to direct the mobile phone 200 tosend a communication (e.g., a telephone call, an SMS text message, aninstant message, and email) to one or more predefined recipients inresponse to actuation of the switch 128. In some implementations, thecommunication can include one or more predetermined messages (e.g.,pre-recorded voice message, pre-configured text or synthesized voicemessage). In some implementations, the communication can be sent to oneor more predetermined recipients (e.g., emergency response center, 911,police, user contacts). The alarm device 112 may be configured to directthe mobile phone 200 to send a communication to one or more predefinedrecipients when the user separation sensor arrangement 118 determinesthat the threshold separation distance from the wearable component 120is exceeded, and/or that the wearable component 120 has become detachedfrom the accessory 100.

The alarm device 112 may be configured to direct the mobile phone 200 toactivate a camera (e.g., to capture still or motion video of thesurroundings), microphone (e.g., to capture sounds in the surroundingenvironment), position location detector system (e.g., GPS or otherlocation system to identify a local or global location of the phone),light output system to emit a visual indicator (e.g., blink an onboardLED, flash the phone's screen), and/or audio output system (e.g.,built-in speaker of the phone, to emit an audible alarm or call forhelp) of the mobile phone 200, In some implementations, thecommunication can include one or more of a distress message, positioningcoordinates (e.g., based on a GPS sensor in the mobile device), audiocaptured by mobile device, and video captured by the mobile device. Thefunctionality of being able to send a communication in response to analarm or other predetermined condition may be implemented by specializedsoftware installed on and executed by the mobile device, for example, adownloadable software application (e.g., app) or other softwarecomponent.

To transmit such notifications, as schematically illustrated in FIG. 7,the mobile phone accessory 100 may further comprise a communicationinterface 134. The communication interface 134 may be configured tocommunicate with a communication interface 206 of the mobile phone 200when directed by the alarm device 112. The communication interface 134of the mobile phone accessory 100 and the communication interface 206 ofthe mobile phone 200 may be any suitable arrangement, such as a deviceor circuitry embodied in either hardware, software, or a combinationthereof that is configured to receive and/or transmit data. Thecommunication interfaces 134, 206 may be configured to receive and/ortransmit data via a wired or wireless connection. In this regard, thecommunication interfaces 134, 206 may include, for example, an antennaand supporting wireless transmitter, receiver, or transceiver hardwareand/or hardwired components and/or software. For example, thecommunication interface 134 of the mobile phone accessory 100 mayinclude a wireless transmitter, receiver, or transceiver configured tocommunicate with the communication interface 206 of the mobile phone 200via BLUETOOTH, photonic (e.g., infrared, IRDA), acoustic, ultrasonic,ZigBee, WiFi, or any other appropriate communication format. Further,the communication interface 206 of the mobile phone 200 may beconfigured to communicate with one or more cellular networks via anyknown communication standard.

Thereby, the communication interface 206 of the mobile phone 200 maysend a communication to one or more designated contacts. The designatedcontacts may be selected by the user via a user-installable softwareapplication that may be loaded on the mobile phone 200. The type and/orcontent of the message may also be configured within the application.

In some embodiments, the communication may include a phone call with anaudible message. For example, a prerecorded message may be played toconvey a request for help. Alternatively or additionally, the mobilephone 200 may activate a microphone 208 thereof such that a recipient ofthe call may receive audio relating to the user of mobile phoneaccessory's circumstances (e.g., voice or other sounds corresponding towords or actions of the mobile phone user or anyone or anything elsewithin the range of the mobile phone's microphone 208).

In some embodiments, the communication may include a text message, anemail, or any other electronic communication. Thereby, the communicationmay include, for example, a message conveying a request for help and/orinstructing the recipient to call police or other emergency services.The communication may also include location data regarding a position ofthe mobile phone 200. For example, the mobile phone 200 may furtherinclude a positioning system sensor 210 (e.g., GPS, GLONASS, indoorpositioning), which may determine a location thereof, and such locationinformation may be included in the communication transmitted by thecommunication interface 206 of the mobile phone. For example, therecipients of the communication may be provided with an image showingthe position of the mobile phone 200 and/or a link to a map showing theposition. Such a map may be updated with the positon of the mobile phone200 such that the position thereof may be tracked in the event thatmovement occurs. Thereby, emergency service personnel may be directed tothe location of the mobile phone 200.

In another embodiment, communications may additionally or alternativelybe transmitted to other users of mobile accessory devices in localproximity to the mobile phone accessory 100. For example, thecommunication interface 134 of the mobile phone accessory 100 maydirectly communicate with the communication interface of other nearbymobile phone accessories to alert their users of a nearby user in needof assistance. In some embodiments the mobile phone accessories 100 mayform a mesh network via the communication interfaces 134 to expand thereach of the local alerts.

FIG. 9 schematically illustrates control circuitry components of thealarm device 112 according to an embodiment of the present disclosure.As illustrated, the control circuitry of the alarm device 112 mayinclude or otherwise be in communication with a processor 136 and amemory device 138.

The processor 138 may be embodied in a number of different forms. Forexample, the processor 136 may be embodied as one or more of variousprocessing means such as a coprocessor, a microprocessor, a controller,a digital signal processor (DSP), processing circuitry, or various otherprocessing devices including integrated circuits such as, for example, aspecial-purpose computer chip, or other hardware processor. In anexample embodiment, the processor 136 may be configured to executeinstructions stored in the memory device 138 or otherwise accessible tothe processor. Alternatively or additionally, the processor 136 may beconfigured to execute hard coded functionality. As such, the processor136 may be capable of performing operations according to embodiments ofthe present disclosure while configured accordingly. Alternatively, whenthe processor 136 is embodied as an executor of software instructions,the instructions may specifically configure the processor to perform theoperations described herein. The processor 136 may include a clock, anarithmetic logic unit (ALU) and logic gates configured to supportoperation of the processor, amongst other components.

The memory device 138 may include non-transitory and tangible memorythat may be, for example, volatile and/or non-volatile memory. Thememory device 138 may be configured to store information, data, files,applications, instructions or the like. For example, the memory device138 can be configured to buffer input data for processing by theprocessor 136. Additionally or alternatively, the memory device 138 canbe configured to store instructions for execution by the processor 136.

The processor 136 may be configured to execute program code instructionsstored on a non-transitory computer readable medium. In this regard, anembodiment of a non-transitory computer readable medium for storingcomputer instructions executed by a processor (e.g., processor 136) isprovided, such as the memory device 138. The non-transitory computerreadable medium may comprise program code instructions for performingthe alarm operations described herein.

The various aspects, embodiments, implementations or features of thedescribed embodiments can be used separately or in any combination.Various aspects of the described embodiments can be implemented bysoftware, hardware or a combination of hardware and software. Thedescribed embodiments can also be embodied as computer readable code ona computer readable medium for controlling the above-describedoperations. In particular, computer readable code may be configured toperform each of the operations of the methods described herein andembodied as computer readable code on a computer readable medium forcontrolling the above-described operations. In this regard, a computerreadable storage medium, as used herein, refers to a non-transitory,physical storage medium (e.g., a volatile or non-volatile memory device,which can be read by a computer system. Examples of the computerreadable medium include read-only memory, random-access memory, CD-ROMs,DVDs, magnetic tape, and optical data storage devices. The computerreadable medium can also be distributed over network-coupled computersystems so that the computer readable code is stored and executed in adistributed fashion.

Although the present disclosure is generally described as relating to amobile phone accessory, in another embodiment some or all of thecomponents of the mobile phone accessory described above may be includedin a standalone personal safety device (see, e.g., FIG. 23). In otherwords, a personal safety device may be configured for use withoutrequiring a separate mobile phone. In this regard, the personal safetydevice may be configured to communicate with cellular networks andconfigured to determine a location of the personal safety device. Thus,for example, the communication interface may be configured tocommunicate with cellular or satellite networks in order to allow fortransmission of electronic communications and the personal safety devicemay further include a GPS sensor configured to determine the location ofthe personal safety device.

As noted above, the form factor of the mobile phone accessory 100 mayvary. In this regard, FIG. 10 illustrates an embodiment of the mobilephone accessory 100A including the switch 128 of FIG. 8. FIG. 11illustrates an embodiment of the mobile phone accessory 100B provided inthe form of a case. FIG. 12 illustrates an embodiment of the mobilephone accessory 100C wherein the mobile phone accessory is substantiallyrectangular with rounded corners. FIG. 13 illustrates an embodiment ofthe mobile phone accessory 100D wherein the mobile phone accessory isround. FIG. 14 illustrates an embodiment of the mobile phone accessory100E wherein the user separation sensor arrangement includes a wirelesswearable component 120D. FIGS. 15-18 illustrate an embodiment of themobile phone accessory 100F wherein the mobile phone accessory isovular. FIG. 19 illustrates an embodiment of the mobile phone accessory100G wherein the wearable component of the user separation sensorarrangement is not attached for illustration purposes. FIG. 20illustrates an embodiment of the mobile phone accessory 100H wherein amobile phone is not attached for illustration purposes. FIG. 21illustrates an embodiment of the mobile phone accessory 100I wherein themobile phone accessory is attached to a case 208 for the mobile phone200.

In examples such as the mobile accessory device 100E and the wearablecomponent 120D of FIG. 14, the connection between the wearable component120D and the mobile device accessory 100E may be wireless. For example,the connection may be a radio frequency connection (e.g., BLUETOOTHconnection), a photonic connection (e.g., infrared beacon, IrDA), sonic(e.g., ultrasonic beacon), or magnetic (e.g., a Hall sensor in themobile device accessory activated when a magnet in the wearablecomponent is moved too far away).

In some embodiments, the separation sensor arrangement 118 can beconfigured to measure or otherwise detect a strength of a wirelesssignal provided by the wearable component. The strength of the signalcan be proportional or otherwise representative of the distance betweenthe wearable component and the separation sensor arrangement 118 (e.g.,the larger the separation distance, the weaker the received signal willbe). The separation sensor arrangement 118 can compare the strength ofthe received signal to a predetermined threshold signal strength value.If the received signal strength is determined to be less than thethreshold signal strength value, the separation sensor arrangement 118can provide an activation signal to the alarm device 112. In someembodiments, the separation sensor arrangement 118 may be configured todetect the presence and/or absence of a beacon signal, and the thresholdsignal strength value can be a timeout value. For example, the wearablecomponent 100D can be configured to emit a beacon signal once everysecond, and the threshold signal strength value can be set to fiveseconds. In this example, the separation sensor arrangement 118 candetermine that no beacon signal has been received for at least fiveseconds, and respond by determining that the wearable component 100D isno longer in proximity (and/or physically attached) to the mobileaccessory device 100E and provide an activation signal to the alarmdevice 112.

FIGS. 22A-F illustrate steps associated with usage of a wrist strap 120Iof the mobile phone accessory 100I of FIG. 21. FIG. 22A shows a mobilephone 200 having an attached (e.g., adhesively, with tabs/slots, orhooks and loops) mobile device accessory 100I. The microphone of themobile device 200 is shown at 208. The mobile device accessory 100Iincludes a groove 209 defined in the surface of the mobile deviceaccessory 100I, sized to accommodate storage of the wearable component120I. FIGS. 22B-D show a user in the process of removing the wearablecomponent 120I from the groove 209 so that he or she can engage thewearable component 120I into a worn position, such as shown in FIG. 22E(e.g., donned upon a wrist). FIG. 22F illustrates how the user mighthold mobile device 200 after he or she has removed wearable component120I form the groove 209 and put it around his or her wrist. The usercan later remove (e.g., doff) the wearable component 120I and stow it inthe groove 209.

FIG. 23 illustrates an embodiment of a personal safety device 300 thatdoes not require usage of a separate mobile phone, but rather isimplemented as a standalone, dedicated personal safety device. Such apersonal safety device 300 may have sufficient components andfunctionalities to perform the operation

Further, FIGS. 24-26 illustrate an embodiment of the mobile phoneaccessory 100J according to an additional example embodiment of thepresent disclosure. The mobile phone accessory 100J is illustrated asbeing attached to the mobile phone 200 as discussed above. The overallconfiguration and features of the mobile phone accessory 100J may besubstantially similar to that of the mobile phone accessory 100 ofFIG. 1. However, the mobile phone accessory 100J of FIGS. 24-26 may varyin one or more respects.

For example, as illustrated, the position of the components of themobile phone accessory 100J relative to the housing 102J may vary. Inthis regard, the light output device 116J may be positioned at a topcenter of the outer surface 106J of the housing 102J. This configurationmay allow the light output device 116J to be exposed and visible abovethe top of the user's hand in the event of activation while in theuser's hand, such that it is more noticeable. The audio output device114J may be positioned in a similar location as compared to the audiooutput device 114 of the mobile phone accessory 100 of FIG. 1, but thehousing 102J may include a pattern of round holes defined there throughthat allow sounds to exit the mobile phone accessory 100J. Further, theswitch 128J may be substantially similar to the switch 128A describedabove with respect to FIG. 8, but the ends thereof may be relativelymore rounded for improved ergonomics and/or appearance. Additionally,the battery portion may be positioned at the attachment surface of themobile phone accessory 100J engaged with the mobile phone 200 in orderto de-clutter the exposed outer surfaces thereof.

Further, the mobile phone accessory 100J may include a nail slot 140J,which may be positioned between the connector 126J and the housing 102J.In this regard, in some embodiments the user separation sensorarrangement may be activated by engaging a fingernail in the nail slot140J and releasing the connector 126 rather than requiring the user torelease the wearable component 120J first. Thereby, activation of theuser separation sensor arrangement may be conducted quickly (e.g., in anunexpected dangerous situation), if necessary.

Further, the particular configuration of the wearable component 120J maydiffer. In this regard, as illustrated in FIGS. 24-26, in an un-extendedconfiguration, the lanyard 124J may wrap around a lower corner of thehousing 102J and extend to and wrap around a top corner of the housing.The wearable component 120J may then extend downward from the lanyard124J to the bottom edge of the housing 102J. A clip 142J may bepositioned at the interface between the lanyard 124J and the wearablecomponent 120J. In some embodiments, the clip 142J may be moveable suchthat the relative length of the wearable component 120J relative to thelanyard 124J is adjustable and thereby a user may tighten the wearablecomponent around his or her wrist during use. The clip 142J may beconfigured to engage the housing 102J when in an un-extendedconfiguration to retain the lanyard 124J in place.

Further, the wearable component 120J may include a pull tab 144J at anend thereof. The pull tab 144J may retain the wearable component 120J inthe un-extended configuration until the user releases the pull tab fromengagement with the housing 102J. Releasing the pull tab 144J fromengagement with the housing 102J may activate one or more features. Forexample, in response to the pull tab 144J being released, thepositioning system sensor 210 (see, FIG. 7) may be instructed toactivate via the communication mechanisms described above. Accordingly,when a user extends the wearable component 120J and places it on his orher wrist, for example when confronted with a dangerous situation orlocation, the user's location may be determined and tracked at thattime. Thereby, in the event that the user pulls out the connector 126J,the positioning system sensor 210 will have already been activated inorder to substantially immediately provide the user's location asdescribed above. Thereby, for example, any delays associated withdetermining the user's location may be avoided. Further, the user'slocation may be tracked during the time period during which the pull tab144J is released and thereby the user's location information mayoptionally be shared with one or more persons, if desired.

The embodiment of the mobile phone accessory 100K illustrated in FIGS.27 and 28 is substantially similar to the mobile phone accessory ofFIGS. 24-26 in most respects and hence the configuration thereof willnot be repeated. However, the nail slot 140K is enlarged.

FIGS. 29-35 illustrate various views of another example mobile deviceaccessory 100I according to an additional example embodiment of thepresent disclosure. The mobile phone accessory 100L is configured to beattached to the mobile phone 200 as will be discussed further below. Theoverall configuration and features of the mobile phone accessory 100Lmay be substantially similar to that of the mobile phone accessory 100of FIG. 1. However, the mobile phone accessory 100L of FIGS. 29-35 mayvary in one or more respects.

For example, as illustrated, the position of the components of themobile phone accessory 100L relative to the housing 102L may vary. Theaudio output device 114L may be positioned in a similar location ascompared to the audio output device 114 of the mobile phone accessory100 of FIG. 1, but the housing 102L may include a round hole definedthere through that allow sounds to exit the mobile phone accessory 100L.

Further, the particular configuration of the wearable component 120L maydiffer. In this regard, as illustrated in FIGS. 29-35, in an un-extendedconfiguration, wearable component 120L and the lanyard 124L may bestow-able in a groove 2909 formed about the periphery of the housing102L. Further, the wearable component 120L may include a pull tab 144Lat an end thereof. The pull tab 144L may retain the wearable component120L in the stowed (e.g., un-extended) configuration until the userreleases the pull tab 144L from engagement with the housing 102L.Releasing the pull tab 144L from engagement with the housing 102L mayactivate one or more features. For example, in response to the pull tab144L being released, the positioning system sensor 210 (see, FIG. 7) maybe instructed to activate via the communication mechanisms describedabove. Accordingly, when a user removes the wearable component 120L fromthe groove 2909 and places it on his or her wrist, for example whenconfronted with a dangerous situation or location, the user's locationmay be determined and tracked at that time. Thereby, in the event thatthe user pulls out the connector 126L, the positioning system sensor 210will have already been activated in order to substantially immediatelyprovide the user's location as described above. Thereby, for example,any delays associated with determining the user's location may beavoided. Further, the user's location may be tracked during the timeperiod during which the pull tab 144L is released and thereby the user'slocation information may optionally be shared with one or more persons,if desired.

Further, the switch 128L may be a pressure sensitive or membrane switchdefined as a fingertip-sized recess having a textured pattern (e.g., toease identification and location of the switch 128L by either sight ortouch). In use, the switch may be used to activate an alarm though apredetermined continuous press (e.g., three seconds) or through apredetermined series of presses (e.g., three presses within fiveseconds), for example, to reduce the occurrence of accidentalactivation. In some implementations, the switch 128L may activate adifferent type of alarm than may be triggered by separation of thelanyard. For example, the mobile device accessory 100L may respond toactivation of the switch 128L by initiating a silent alarm to alert oneor more predetermined recipients (e.g., discretely sending a message toa preselected contact), while the mobile device accessory 100L mayrespond to separation of the connector 126L by initiating an audiblealarm and alerting one or more predetermined recipients (e.g., set off asiren and send a message or place a phone call to police).

Further, the mobile phone accessory 100L may include a nail slotpositioned between the connector 126L and the housing 102L. In thisregard, in some embodiments the user separation sensor arrangement maybe activated by engaging a fingernail in the nail slot and releasing theconnector 126L rather than requiring the user to release the wearablecomponent 120L first. Thereby, activation of the user separation sensorarrangement may be conducted quickly (e.g., in an unexpected dangeroussituation), if necessary.

The mobile device accessory 100L also includes a visual indicator 2902(e.g., a light, a display). The visual indicator 2902 is configured toprovide a visible indication of one or more statuses of the mobiledevice accessory. For example, the visual indicator 2902 may blink at afirst rate or pattern (e.g., or illuminate steadily), illuminate at afirst brightness, and/or illuminate with a first color to display afirst condition (e.g., to indicate that the mobile device accessory 100Lis connected to or paired with the mobile phone 200 and/or an associatedalarm software application running on the phone), and blink, illuminate,and/or colorize in different predetermined manners to display otherconditions (e.g., to indicate that the mobile device accessory 100L isnot paired or otherwise communicatively associated with mobile phone200, to indicate that the mobile device accessory 100L is not able tocommunicate with the mobile phone 200 to which it was previously pairedor otherwise communicatively associated). In some embodiments, thevisual indicator 2902 may display differently shaped predeterminedpatterns to indicate different conditions of the mobile device accessory100L. For example, the visual indicator 2902 may appear as aperiodically blinking, blue BLUETOOTH symbol to indicate that the mobiledevice accessory 100L is ready for pairing, and may appear as a red “X”when the mobile device accessory 100L is not able to communicate withthe paired mobile phone 200 or an associated software applicationinstalled thereupon and configured to respond to alarm signals from themobile device accessory 100L.

Referring now to FIG. 35, a rear perspective view of the mobile deviceaccessory 100L is shown. The rear side of the housing 102L includes anadhesive pad 3502. In use, the adhesive pad 3502 can be contactedagainst a surface of the mobile phone 200 (e.g., the rear surface 202).

FIG. 36 is a flow chart of an example process 3600 for using an examplemobile device accessory. In some implementations, the process 3600 canbe performed using one or more of the example mobile device accessories100A-100L of FIGS. 1-23, and 25-35, and the personal safety device 300of FIG. 23.

At 3610, an attachment surface of a housing of a mobile device accessoryis engaged to a mobile device. For example, the attachment surface 104of the housing 102 may be configured to engage the rear surface 202 ofthe mobile phone 200. In another example, the adhesive pad 3502 shown inFIG. 35 can be used to secure the mobile device accessory 100L to amobile device, such as to the rear surface 202 of the mobile device 200.

At 3620, a wearable component is donned upon a user of the mobiledevice. For example, the wearable component 120 of FIG. 5, the wirelesswearable component 120D of FIG. 14, and/or the wrist strap 120I of FIGS.22A-F can be worn about a user's wrist. In other examples, the wearablecomponent can donned upon or otherwise carried by a user (e.g., apendant, a ring, an earring, an earpiece, bracelet, wristwatch, eyeglassframe, hair clip), the user's clothing (e.g., a remote unit carried inthe user's pocket, a pin, a badge, clipped to a belt, a belt buckle,head band, hat), and/or the user's personal effects (e.g., a remote unitcarried in purse or bag, a key fob, an identification card).

At 3630, a separation detector detects that the wearable component hasseparated from the housing. For example, the connectivity sensor 122 candetermine that the wearable component 120 has exceeded a thresholdseparation distance from the alarm device 112 and/or that the wearablecomponent 120 has become physically detached from the mobile deviceaccessory 100.

In some embodiments, the process 3600 can include detecting a mechanicalseparation of the housing and a lanyard affixed to the wearablecomponent, the lanyard having a predetermined length and mechanicallyconnecting the wearable component to the housing, the lanyard beingmechanically separable from the housing when distance between thewearable component and the housing exceeds the predetermined length. Forexample, the connectivity sensor 122 can determine that the wearablecomponent 120 has become detached, disengaged, or otherwise physicallyseparated from the alarm device 112.

In some embodiments, detecting that the wearable component has separatedfrom the housing can include determining a signal strength of a wirelesstether signal transmitted by a wireless transmitter of the wearablecomponent to a wireless receiver arranged within the housing and incommunication with the separation detector, the signal strength beingrepresentative of a distance between the wearable component and thehousing, and determining that the signal strength is less than or equalto a predetermined signal strength defining a predetermined separationdistance. For example, the separation sensor arrangement 118 candetermine that the wearable component 120D has exceeded a thresholdseparation distance from the alarm device 112, or that a periodic beacontransmitted by the wearable component 120D has not been received for apredetermined length of time.

At 3640, an alarm device is activated based on detecting that thewearable component has separated from the housing. For example, thealarm device 112 of FIG. 7 can be activated. In some embodiments,activating the alarm device can include transmitting an alarm signal;and wherein the process 3600 can also include receiving, by mobiledevice, the alarm signal, and sending, by the mobile device and inresponse to the receiving the alarm signal, a predeterminedcommunication to one or more predefined recipients. For example, thealarm device 112 of FIG. 7 can activate the communication interface 134to communicate with the mobile phone 200. The mobile phone 200 may havea software application installed and executing thereupon, and thesoftware application can be configured to react to the communicationfrom the mobile device accessory 100E to cause the mobile phone tocommunicate with one or more predetermined recipients. For example, thesoftware application may be configured to initiate a call, send a textmessage, email, media file, media stream, location information (e.g.,GPS data), captured audio and/or video, or any other appropriateinformation to one or more contacts previously identified by the user(e.g., family member, friend, neighbor, doctor, nurse, caregiver,welfare official, emergency services, 911)

In some embodiments, activating the alarm device can include activatingan audio output component disposed within the housing and configured toemit an audible alert when activated. For example, the alarm device 112includes the audio output device 114 that can emit a siren, noise,prerecorded or synthesized spoken words or other sounds, or any otherappropriate sound that is sufficiently loud enough to attract theattention of other nearby persons and/or repel an attacker. In someembodiments, activating the alarm device can include activating a visualoutput configured to emit an audible alert when activated. For example,the alarm device 112 includes the light output device 116 that can emita light or strobe to attract the attention of other nearby personsand/or repel an attacker.

In some embodiments, the process 3600 can include removing the wearablecomponent from a cavity defined by the housing, wherein the cavity issized to accommodate storage of the wearable component. For example,FIGS. 22A-22F show that the example wearable component 120I can be atleast partly removed from the mobile device accessory 100I before beingworn about the wrist of the user. In some embodiments, the process 3600can also include doffing the wearable component from the user, andstowing the wearable component in a cavity defined by the housing,wherein the cavity is sized to accommodate storage of the wearablecomponent. For example, the process illustrated by FIGS. 22A-22F can bereversed such that the user can take the wearable component 120I or 120Loff his or her wrist, and placed back in the groove 209 or 2909 definedin the housing of the mobile device accessory 100I or 100L.

In another configuration, the mobile device accessory need not beconfigured to be physically attachable to the mobile device, but rathermay be implemented as a standalone unit that can be carried or worn by auser (e.g., as a wallet attachment or insert, key fob, bracelet, or thelike), and which maintains a wireless communication connection betweenthe accessory and the mobile device. In this configuration, other thanthe lack of physical attachment, the accessory can be designed andimplemented to have any or all of the same features and/or functionalityas the configuration in which the accessory is designed to be attachedto the mobile device, as described above.

Although a few implementations have been described in detail above,other modifications are possible. For example, the logic flows depictedin the figures do not require the particular order shown, or sequentialorder, to achieve desirable results. In addition, other steps may beprovided, or steps may be eliminated, from the described flows, andother components may be added to, or removed from, the describedsystems. Accordingly, other implementations are within the scope of thefollowing claims.

What is claimed is:
 1. A mobile device accessory, comprising: a housingdefining an attachment surface that is configured to engage a mobiledevice; a wearable component configured to be worn by a user of themobile device; a separation detector configured to detect separation ofthe wearable component relative to the housing, and provide a signalwhen the wearable component becomes separated from the housing; and, analarm device configured to activate in response to the signal.
 2. Themobile device accessory of claim 1, wherein the wearable device isconfigured to separate from the housing when the wearable componentexceeds a predetermined separation distance from the housing.
 3. Themobile device accessory of claim 1, wherein the wearable componentcomprises a lanyard having a predetermined length configured tomechanically attach to the housing, and configured to mechanicallyseparate from the housing when a distance between the wearable componentand the housing exceeds the predetermined length.
 4. The mobile deviceaccessory of claim 3, wherein the separation detector includes aconnectivity sensor configured to determine whether the housing and thelanyard are mechanically separated.
 5. The mobile device accessory ofclaim 1, wherein the wearable component further comprises a wirelesstransmitter configured to transmit a wireless tether signal, and theseparation detector further comprises a wireless receiver configured toreceive the wireless tether signal at a received signal strength that isrepresentative of a distance between the wearable component and thehousing, and detect separation of the wearable component from thehousing based on a comparison of the received signal strength to apredetermined signal strength defining a predetermined separationdistance.
 6. The mobile device accessory of claim 1, wherein the alarmdevice further comprises an audio output component disposed within thehousing and configured to emit an audible alert when activated.
 7. Themobile device accessory of claim 1, wherein the alarm device isconfigured to provide an alarm signal to the mobile device when thealarm device is activated.
 8. The mobile device accessory of claim 7,further comprising instructions stored in a memory device of the mobiledevice, that when executed by a data processing apparatus of the mobiledevice to perform operations comprising: receiving, from the alarmdevice, the alarm signal; and sending, in response to the received alarmsignal, a communication to one or more recipients.
 9. The mobile deviceaccessory of claim 8, the operations further comprising determining, bythe mobile device, a location of the mobile device, wherein thecommunication includes location data that is descriptive of thedetermined location.
 10. The mobile device accessory of claim 1, thehousing further comprising an input mechanism, wherein the alarm deviceis further configured to be activated in response to actuation of theinput mechanism.
 11. The mobile device accessory of claim 10, whereinactuation of the input mechanism comprises movement of the inputmechanism along a predefined non-linear path.
 12. A mobile deviceaccessory comprising: (a) a housing defining an attachment surface thatis configured to engage a mobile device, the engagement including both aphysical attachment to the mobile device and a communications connectionto the mobile device for controlling operation of the mobile device; (b)a wearable component configured to be worn by a user of the mobiledevice; and (c) control circuitry to control operation of the mobiledevice accessory, the control circuitry configured to perform operationscomprising: (i) detect that the wearable component has become separatedfrom the mobile device accessory; and (ii) in response to the detection,cause the mobile device to perform one or more predetermined operations.13. The mobile device accessory of claim 12, wherein the communicationsconnection to the mobile device comprises a wireless connection.
 14. Themobile device accessory of claim 13, wherein the wireless connectioncomprises a BLUETOOTH connection.
 15. The mobile device accessory ofclaim 12, wherein controlling operation of the mobile device comprisescommunicating with a software application executing on the mobiledevice.
 16. The mobile device accessory of claim 12, wherein the controlcircuitry comprises a processor and a memory containing machineinstructions to be executed by the processor.
 17. The mobile deviceaccessory of claim 12, wherein the wearable component comprises alanyard component physically connected to the mobile device accessory.18. The mobile device accessory of claim 17, wherein detecting that thewearable component has become separated comprises detecting a physicaldetachment between the wearable component and the mobile deviceaccessory.
 19. The mobile device accessory of claim 12, wherein thewearable component comprises a detached component communicativelycoupled to the mobile device accessory.
 20. The mobile device accessoryof claim 19, wherein detecting that the wearable component has becomeseparated comprises detecting that a separation between the wearablecomponent and the mobile device accessory exceeds a predetermineddistance.
 21. The mobile device accessory of claim 12, wherein causingthe mobile device to perform one or more predetermined operationscomprises causing an app executing on the mobile device to perform oneor more of: initiating a communication with another communicationdevice, activating a camera on mobile device, activating a microphone onthe mobile device, emitting an audible sound, and turning on locationdetector.
 22. The mobile device accessory of claim 21, whereininitiating a communication with another communication device comprisessending one or more predetermined messages to one or more predeterminedrecipients.
 23. The mobile device accessory of claim 22, wherein thepredetermined message comprises one or more of: a distress message,positioning coordinates, audio captured by mobile device, and videocaptured by the mobile device.
 24. The mobile device accessory of claim21, wherein initiating a communication with another communication devicecomprises initiating one or more of: a telephone call, an email, and atext message.
 25. The mobile device accessory of claim 12, wherein themobile device accessory further comprises an audible alarm.
 26. Themobile device accessory of claim 25, wherein the control circuitry isfurther configured to sound the audible alarm upon detecting that thewearable component has become separated from the mobile deviceaccessory.
 27. A mobile device accessory comprising: (a) a communicationmechanism configured to maintain a wireless communications connectionbetween the mobile device accessory and the mobile device forcontrolling operation of the mobile device; (b) an activation mechanismconfigured to be activated by a user; and (c) a control mechanism tocontrol operation of the mobile device accessory, the control circuitryconfigured to perform operations comprising: (i) detect that the userhas activated the activation mechanism; and (ii) in response to thedetection, cause the mobile device to perform one or more predeterminedoperations.
 28. The mobile device accessory of claim 27 furthercomprising an alarm mechanism configured to cause a human-perceptiblealarm in response to a detection that the user has activated the alarmmechanism.
 29. The mobile device accessory of claim 27 wherein theactivation mechanism comprises a button that is pressable by the user ora wearable component that is designed to be worn by the user or both,and wherein the activation mechanism is caused to be activated uponeither of a button press or a physical separation of the wearablecomponent from the mobile device accessory.